MP4 to MP3 Converter

Extract high-fidelity MP3 audio from MP4, WebM, and MOV video files. Convert videos to sound tracks up to 320 kbps right in your web browser with zero server uploads.

MP4 MOV WebM → Studio MP3 (Up to 320 kbps)
Video Demuxer MP4Box ISOBMFF Engine
Audio Decoder WebCodecs AudioDecoder
Audio Encoder LameJS 1.2.1 (LGPL-3.0)
Privacy 100% On-Device
video file • duration

Select an MP4 or video file to extract audio

Supports MP4, MOV, and WebM video formats of any size

Choose Video File

•

Extracted Audio Preview

Audio Export Settings

Configure MP3 quality and metadata

320 kbps offers the highest clarity for music videos.

Private In-Browser Extraction

Audio extraction is executed directly on your device via MP4Box ISOBMFF demuxer and LameJS 1.2.1. No audio or video data is transmitted over the internet.

Demuxer: MP4Box ISOBMFF Engine
Decoder: WebCodecs AudioDecoder
Encoder: LameJS 1.2.1 (LGPL-3.0)
Privacy: 100% On-Device

How to Convert MP4 Video to MP3 Audio

Convert music videos, podcast recordings, or speech clips from MP4 to MP3 without installing third-party desktop software or paying for online file converters.

1

Upload Any Video

Drop your MP4, MOV, or WebM video file into the browser.

2

Choose Bitrate

Select up to 320 kbps for studio quality and customize track metadata.

3

Save MP3 Audio

Download the extracted MP3 file directly to your downloads folder.